The AirTAC GFR40015AJF3WT AirTAC Filter Regulator NPT 1/2 in, 5 um is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/2" ports, a automatic drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR40015AJF3WT is a size 400 filter regulator: it removes water and particulate from compressed air and sets a stable downstream pressure in one body. This configuration carries a 1/2 in NPT port, an automatic drain that bleeds collected condensate from the PC bowl without manual attention, a 5 um filter element, and an embedded square gauge reading in bar. The standard regulator covers a 0.15-0.9 MPa (20-130 psi) adjustment range with a 1.0 MPa (145 psi) maximum inlet pressure, and the unit is rated for -5 to 70 C, non-freezing. No mounting bracket is fitted and no reverse/check valve is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options across drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um with W), gauge scale (MPa, psi or bar), thread (PT standard, G and NPT to order) and bracket. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR40015AJF3WT AirTAC Filter Regulator NPT 1/2 in, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar scale |
| Reflux valve | Not fitted |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR400 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Dropping a GFR40015AJF3WT into the 1/2 in supply line at a CNC machining cell gives one device that strips water and fine particulate before clamps and tool-change actuators see the air, while the bar gauge lets a setter read and set the working pressure at the machine. The automatic drain suits an untended cell where nobody walks the bowls.
On a packaging or bottling line, diverters, pushers and sealing cylinders cycle constantly and suffer when condensate carries through. A size 400 filter regulator at the line drop conditions that feed, and the 5 um element protects the directional valves controlling those cylinders. The square bar gauge gives line staff a visible setpoint at the drop.
Bench rigs, environmental chambers and lab pneumatic test stations need air that is both filtered and held at a repeatable pressure. The 5 um grade and stable 0.15-0.9 MPa regulation of this unit suit instrument-grade supply points, and the NPT 1/2 in port matches typical rig drops; the automatic drain keeps the bowl clear between checks.
Step up or down through the GFR sizes (200/300/400/600) so the port and body match the flow your line needs; this unit is the 400 size with a 1/2 in NPT port. Choose the drain to suit access: automatic (as here) where the bowl is hard to reach, manual where an operator attends the unit, or differential-pressure as the default. Pick 40 um for general upstream protection or 5 um (this unit) where downstream valves and actuators need finer filtration. The gauge is embedded and square as standard with MPa, psi or bar scales - this one reads in bar - and an external round gauge is optional. Thread is PT as the catalogue standard with G and NPT as orderable options; brackets are optional on GFR.
One honest note before you order: AirTAC publishes flow as curves, not a single rated figure, so send us your required flow and line pressure and we will confirm the sizing against the datasheet before you commit.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves, not as a single rated figure, so we will not quote you a number that is not in the datasheet. Send us your required flow, upstream pressure and set pressure, and we will confirm against the datasheet curves whether this 400-size, 1/2 in NPT unit is correctly sized - or whether you should step to another size - before you order.
The GFR series defaults to a 40 um element and a differential-pressure drain; the W in the code selects the finer 5 um element, and the A selects the automatic drain. The 5 um grade suits downstream valves and actuators that need finer protection, while the automatic drain bleeds condensate from the PC bowl on its own - useful where the unit is mounted out of easy reach. If your application is general upstream protection with an attended installation, the 40 um / differential-pressure version is the standard choice.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.